diff options
Diffstat (limited to 'ncurses-5.3/ncurses/base/lib_color.c')
-rw-r--r-- | ncurses-5.3/ncurses/base/lib_color.c | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/ncurses-5.3/ncurses/base/lib_color.c b/ncurses-5.3/ncurses/base/lib_color.c new file mode 100644 index 0000000..f6531ed --- /dev/null +++ b/ncurses-5.3/ncurses/base/lib_color.c @@ -0,0 +1,531 @@ +/**************************************************************************** + * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc. * + * * + * Permission is hereby granted, free of charge, to any person obtaining a * + * copy of this software and associated documentation files (the * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * + * and: Eric S. Raymond <esr@snark.thyrsus.com> * + ****************************************************************************/ + +/* lib_color.c + * + * Handles color emulation of SYS V curses + */ + +#include <curses.priv.h> + +#include <term.h> +#include <tic.h> + +MODULE_ID("$Id$") + +/* + * These should be screen structure members. They need to be globals for + * historical reasons. So we assign them in start_color() and also in + * set_term()'s screen-switching logic. + */ +NCURSES_EXPORT_VAR(int) COLOR_PAIRS = 0; +NCURSES_EXPORT_VAR(int) COLORS = 0; + +#define DATA(r,g,b) {r,g,b, 0,0,0, 0} + +/* + * Given a RGB range of 0..1000, we'll normally set the individual values + * to about 2/3 of the maximum, leaving full-range for bold/bright colors. + */ +#define RGB_ON 680 +#define RGB_OFF 0 +/* *INDENT-OFF* */ +static const color_t cga_palette[] = +{ + /* R G B */ + DATA(RGB_OFF, RGB_OFF, RGB_OFF), /* COLOR_BLACK */ + DATA(RGB_ON, RGB_OFF, RGB_OFF), /* COLOR_RED */ + DATA(RGB_OFF, RGB_ON, RGB_OFF), /* COLOR_GREEN */ + DATA(RGB_ON, RGB_ON, RGB_OFF), /* COLOR_YELLOW */ + DATA(RGB_OFF, RGB_OFF, RGB_ON), /* COLOR_BLUE */ + DATA(RGB_ON, RGB_OFF, RGB_ON), /* COLOR_MAGENTA */ + DATA(RGB_OFF, RGB_ON, RGB_ON), /* COLOR_CYAN */ + DATA(RGB_ON, RGB_ON, RGB_ON), /* COLOR_WHITE */ +}; + +static const color_t hls_palette[] = +{ + /* H L S */ + DATA( 0, 0, 0), /* COLOR_BLACK */ + DATA( 120, 50, 100), /* COLOR_RED */ + DATA( 240, 50, 100), /* COLOR_GREEN */ + DATA( 180, 50, 100), /* COLOR_YELLOW */ + DATA( 330, 50, 100), /* COLOR_BLUE */ + DATA( 60, 50, 100), /* COLOR_MAGENTA */ + DATA( 300, 50, 100), /* COLOR_CYAN */ + DATA( 0, 50, 100), /* COLOR_WHITE */ +}; +/* *INDENT-ON* */ + +#if NCURSES_EXT_FUNCS +/* + * These are called from _nc_do_color(), which in turn is called from + * vidattr - so we have to assume that SP may be null. + */ +static int +default_fg(void) +{ + return (SP != 0) ? SP->_default_fg : COLOR_WHITE; +} + +static int +default_bg(void) +{ + return SP != 0 ? SP->_default_bg : COLOR_BLACK; +} +#else +#define default_fg() COLOR_WHITE +#define default_bg() COLOR_BLACK +#endif + +/* + * SVr4 curses is known to interchange color codes (1,4) and (3,6), possibly + * to maintain compatibility with a pre-ANSI scheme. The same scheme is + * also used in the FreeBSD syscons. + */ +static int +toggled_colors(int c) +{ + if (c < 16) { + static const int table[] = + {0, 4, 2, 6, 1, 5, 3, 7, + 8, 12, 10, 14, 9, 13, 11, 15}; + c = table[c]; + } + return c; +} + +static void +set_background_color(int bg, int (*outc) (int)) +{ + if (set_a_background) { + TPUTS_TRACE("set_a_background"); + tputs(tparm(set_a_background, bg), 1, outc); + } else { + TPUTS_TRACE("set_background"); + tputs(tparm(set_background, toggled_colors(bg)), 1, outc); + } +} + +static void +set_foreground_color(int fg, int (*outc) (int)) +{ + if (set_a_foreground) { + TPUTS_TRACE("set_a_foreground"); + tputs(tparm(set_a_foreground, fg), 1, outc); + } else { + TPUTS_TRACE("set_foreground"); + tputs(tparm(set_foreground, toggled_colors(fg)), 1, outc); + } +} + +static void +init_color_table(void) +{ + const color_t *tp; + int n; + + tp = (hue_lightness_saturation) ? hls_palette : cga_palette; + for (n = 0; n < COLORS; n++) { + if (n < 8) { + SP->_color_table[n] = tp[n]; + } else { + SP->_color_table[n] = tp[n % 8]; + if (hue_lightness_saturation) { + SP->_color_table[n].green = 100; + } else { + if (SP->_color_table[n].red) + SP->_color_table[n].red = 1000; + if (SP->_color_table[n].green) + SP->_color_table[n].green = 1000; + if (SP->_color_table[n].blue) + SP->_color_table[n].blue = 1000; + } + } + } +} + +/* + * Reset the color pair, e.g., to whatever color pair 0 is. + */ +static bool +reset_color_pair(void) +{ + bool result = FALSE; + + if (orig_pair != 0) { + TPUTS_TRACE("orig_pair"); + putp(orig_pair); + result = TRUE; + } + return result; +} + +/* + * Reset color pairs and definitions. Actually we do both more to accommodate + * badly-written terminal descriptions than for the relatively rare case where + * someone has changed the color definitions. + */ +bool +_nc_reset_colors(void) +{ + int result = FALSE; + + T((T_CALLED("_nc_reset_colors()"))); + if (SP->_color_defs > 0) + SP->_color_defs = -(SP->_color_defs); + + if (reset_color_pair()) + result = TRUE; + if (orig_colors != 0) { + TPUTS_TRACE("orig_colors"); + putp(orig_colors); + result = TRUE; + } + returnBool(result); +} + +NCURSES_EXPORT(int) +start_color(void) +{ + int result = ERR; + + T((T_CALLED("start_color()"))); + + if (!SP->_coloron) { + + if (reset_color_pair() != TRUE) { + set_foreground_color(default_fg(), _nc_outch); + set_background_color(default_bg(), _nc_outch); + } + + if (max_pairs > 0 && max_colors > 0) { + COLOR_PAIRS = SP->_pair_count = max_pairs; + COLORS = SP->_color_count = max_colors; + + if ((SP->_color_pairs = typeCalloc(unsigned short, + (unsigned) max_pairs)) != 0) { + if ((SP->_color_table = typeCalloc(color_t, max_colors)) != 0) { + SP->_color_pairs[0] = PAIR_OF(default_fg(), default_bg()); + init_color_table(); + + T(("started color: COLORS = %d, COLOR_PAIRS = %d", + COLORS, COLOR_PAIRS)); + + SP->_coloron = 1; + result = OK; + } else { + FreeAndNull(SP->_color_pairs); + } + } + } + } + returnCode(OK); +} + +/* This function was originally written by Daniel Weaver <danw@znyx.com> */ +static void +rgb2hls(short r, short g, short b, short *h, short *l, short *s) +/* convert RGB to HLS system */ +{ + short min, max, t; + + if ((min = g < r ? g : r) > b) + min = b; + if ((max = g > r ? g : r) < b) + max = b; + + /* calculate lightness */ + *l = (min + max) / 20; + + if (min == max) { /* black, white and all shades of gray */ + *h = 0; + *s = 0; + return; + } + + /* calculate saturation */ + if (*l < 50) + *s = ((max - min) * 100) / (max + min); + else + *s = ((max - min) * 100) / (2000 - max - min); + + /* calculate hue */ + if (r == max) + t = 120 + ((g - b) * 60) / (max - min); + else if (g == max) + t = 240 + ((b - r) * 60) / (max - min); + else + t = 360 + ((r - g) * 60) / (max - min); + + *h = t % 360; +} + +/* + * Extension (1997/1/18) - Allow negative f/b values to set default color + * values. + */ +NCURSES_EXPORT(int) +init_pair(short pair, short f, short b) +{ + unsigned result; + + T((T_CALLED("init_pair(%d,%d,%d)"), pair, f, b)); + + if ((pair < 0) || (pair >= COLOR_PAIRS)) + returnCode(ERR); +#if NCURSES_EXT_FUNCS + if (SP->_default_color) { + if (f < 0) + f = C_MASK; + if (b < 0) + b = C_MASK; + if (f >= COLORS && f != C_MASK) + returnCode(ERR); + if (b >= COLORS && b != C_MASK) + returnCode(ERR); + } else +#endif + { + if ((f < 0) || (f >= COLORS) + || (b < 0) || (b >= COLORS) + || (pair < 1)) + returnCode(ERR); + } + + /* + * When a pair's content is changed, replace its colors (if pair was + * initialized before a screen update is performed replacing original + * pair colors with the new ones). + */ + result = PAIR_OF(f, b); + if (SP->_color_pairs[pair] != 0 + && SP->_color_pairs[pair] != result) { + int y, x; + attr_t z = COLOR_PAIR(pair); + + for (y = 0; y <= curscr->_maxy; y++) { + struct ldat *ptr = &(curscr->_line[y]); + bool changed = FALSE; + for (x = 0; x <= curscr->_maxx; x++) { + if ((AttrOf(ptr->text[x]) & A_COLOR) == z) { + /* Set the old cell to zero to ensure it will be + updated on the next doupdate() */ + SetChar(ptr->text[x], 0, 0); + CHANGED_CELL(ptr, x); + changed = TRUE; + } + } + if (changed) + _nc_make_oldhash(y); + } + } + SP->_color_pairs[pair] = result; + if ((int) (SP->_current_attr & A_COLOR) == COLOR_PAIR(pair)) + SP->_current_attr |= A_COLOR; /* force attribute update */ + + if (initialize_pair) { + const color_t *tp = hue_lightness_saturation ? hls_palette : cga_palette; + + T(("initializing pair: pair = %d, fg=(%d,%d,%d), bg=(%d,%d,%d)", + pair, + tp[f].red, tp[f].green, tp[f].blue, + tp[b].red, tp[b].green, tp[b].blue)); + + if (initialize_pair) { + TPUTS_TRACE("initialize_pair"); + putp(tparm(initialize_pair, + pair, + tp[f].red, tp[f].green, tp[f].blue, + tp[b].red, tp[b].green, tp[b].blue)); + } + } + + returnCode(OK); +} + +#define okRGB(n) ((n) >= 0 && (n) < 1000) + +NCURSES_EXPORT(int) +init_color(short color, short r, short g, short b) +{ + int result = ERR; + + T((T_CALLED("init_color(%d,%d,%d,%d)"), color, r, g, b)); + + if (initialize_color != NULL + && (color >= 0 && color < COLORS) + && (okRGB(r) && okRGB(g) && okRGB(b))) { + + SP->_color_table[color].init = 1; + SP->_color_table[color].r = r; + SP->_color_table[color].g = g; + SP->_color_table[color].b = b; + + if (hue_lightness_saturation) { + rgb2hls(r, g, b, + &SP->_color_table[color].red, + &SP->_color_table[color].green, + &SP->_color_table[color].blue); + } else { + SP->_color_table[color].red = r; + SP->_color_table[color].green = g; + SP->_color_table[color].blue = b; + } + + TPUTS_TRACE("initialize_color"); + putp(tparm(initialize_color, color, r, g, b)); + SP->_color_defs = max(color + 1, SP->_color_defs); + result = OK; + } + returnCode(result); +} + +NCURSES_EXPORT(bool) +can_change_color(void) +{ + T((T_CALLED("can_change_color()"))); + returnCode((can_change != 0) ? TRUE : FALSE); +} + +NCURSES_EXPORT(bool) +has_colors(void) +{ + T((T_CALLED("has_colors()"))); + returnCode((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs) + && (((set_foreground != NULL) + && (set_background != NULL)) + || ((set_a_foreground != NULL) + && (set_a_background != NULL)) + || set_color_pair)) ? TRUE : FALSE); +} + +NCURSES_EXPORT(int) +color_content(short color, short *r, short *g, short *b) +{ + T((T_CALLED("color_content(%d,%p,%p,%p)"), color, r, g, b)); + if (color < 0 || color >= COLORS) + returnCode(ERR); + + if (r) + *r = SP->_color_table[color].red; + if (g) + *g = SP->_color_table[color].green; + if (b) + *b = SP->_color_table[color].blue; + T(("...color_content(%d,%d,%d,%d)", color, *r, *g, *b)); + returnCode(OK); +} + +NCURSES_EXPORT(int) +pair_content(short pair, short *f, short *b) +{ + T((T_CALLED("pair_content(%d,%p,%p)"), pair, f, b)); + + if ((pair < 0) || (pair >= COLOR_PAIRS)) + returnCode(ERR); + if (f) + *f = ((SP->_color_pairs[pair] >> C_SHIFT) & C_MASK); + if (b) + *b = (SP->_color_pairs[pair] & C_MASK); + + T(("...pair_content(%d,%d,%d)", pair, *f, *b)); + returnCode(OK); +} + +NCURSES_EXPORT(void) +_nc_do_color(int old_pair, int pair, bool reverse, int (*outc) (int)) +{ + NCURSES_COLOR_T fg = C_MASK, bg = C_MASK; + NCURSES_COLOR_T old_fg, old_bg; + + if (pair < 0 || pair >= COLOR_PAIRS) { + return; + } else if (pair != 0) { + if (set_color_pair) { + TPUTS_TRACE("set_color_pair"); + tputs(tparm(set_color_pair, pair), 1, outc); + return; + } else if (SP != 0) { + pair_content(pair, &fg, &bg); + } + } + + if (old_pair >= 0 + && SP != 0 + && pair_content(old_pair, &old_fg, &old_bg) != ERR) { + if ((fg == C_MASK && old_fg != C_MASK) + || (bg == C_MASK && old_bg != C_MASK)) { +#if NCURSES_EXT_FUNCS + /* + * A minor optimization - but extension. If "AX" is specified in + * the terminal description, treat it as screen's indicator of ECMA + * SGR 39 and SGR 49, and assume the two sequences are independent. + */ + if (SP->_has_sgr_39_49 && old_bg == C_MASK && old_fg != C_MASK) { + tputs("\033[39m", 1, outc); + } else if (SP->_has_sgr_39_49 && old_fg == C_MASK && old_bg != C_MASK) { + tputs("\033[49m", 1, outc); + } else +#endif + reset_color_pair(); + } + } else { + reset_color_pair(); + if (old_pair < 0) + return; + } + +#if NCURSES_EXT_FUNCS + if (fg == C_MASK) + fg = default_fg(); + if (bg == C_MASK) + bg = default_bg(); +#endif + + if (reverse) { + NCURSES_COLOR_T xx = fg; + fg = bg; + bg = xx; + } + + TR(TRACE_ATTRS, ("setting colors: pair = %d, fg = %d, bg = %d", pair, + fg, bg)); + + if (fg != C_MASK) { + set_foreground_color(fg, outc); + } + if (bg != C_MASK) { + set_background_color(bg, outc); + } +} |